Disk-sharpening machine



J. E. BF2VrT/\"q.

DISK 'SHARPNING MACHINE July 31, 1923.

Filed July 26,

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1y g77/- A il L ATTx 50 on the bed 2, of the machine, Aon which bed To all whom t may concern:

Patented July 31, 1923.

saufen swiss JOHN E. BRITTAIN, OF GUILFORDfIVIISSOUR..

DISK-SHARPENING MACHINE. l

Application filed July 26, 1921. Serial No. 487,739.

Be it known that I, JOHN E. BRITTAIN, a citizen ofthe United States, residing at Guilford, in the county of Nodaway and Stateof Missouri, have invented certain new and useful Improvements in Disk-Sharpf ening Machines, of which the following is a specificaion, reference being had therein to the accompanying drawing. My invention relates to improvements in f that class of machines, which are used `for sharpening the disks of agricultural implements, and the objects of my improve# ments are, first; to providea simple, substantial and durable machine of this class,

by the use of which the vedges of disks are evenly ground, at] any predetermined angle of inclination to the sides of thedisks, and said edges are kept cool while being sharpened, second; to provide adjusting means,V

whereby the'machine may ybe vadjusted for sharpening disks of various diameters, third; to provide a machine of this character, which shall evenly grind the edges of disks, which have been bent outvof shape to a 'cerf tain extent, by accident orfrom use, fourth; to provide stopping means, whereby the grinding of a disk is automatically stopped, after grinding a predetermined amountof metal therefrom, fifth; to so arrange the driving means, that the grindingl wheel and the disk are simultaneously rotated by the application thereto of one belt, sixth; to so shape and proportion the parts'V of the machine, that it can be securely mounted on f either a specially constructed stand, or on an ordinary bench or table. f

I attain these objects by lthe mechanism illustrated in the accompanying drawings, infwhich:l i

Figure 1 is a front view of the disk sharpening machine, a portion of the. pressing roller being broken away.` ,.Fig. 2 is aside view in detail, ofthe pressing roller and of the limiting means. Fig.3 is a top view of the machine,'a portion of the disk being indicated by Adot and dash lines. Fig. 4 is a top view in detail of the disk elevating means. Y V

Referring to Fig. l, the ways 1 are formed the grinding shaft 3 is rotatably. mounted. The drive pulley l4 (seeFig. 3,) vis secured on one end of said shaft, and the grinding wheel is Secured on the other end thereof.

lhe table 6 is slidablv mounted onsaidv nut 7.. The bearing brackets'S and ,9 are formed with said table, in lthe'ez'rtren'iities of which brackets, the disk shaft10 is-rotatably mounted.

The upper end portion 1 1, off said shaft 10,' is formedY square, transversely, on'which portion the disk l2, offaln agri# cultural limplementis loosely mounted, forl ways, and is secured at 'variously adjustedy distances from theishaft 3,'by the bolt andA Ydisk oscillation thereon.' YThe channeled shifter collar 13 is securedon said disk shaft, with which collar, one end ofthe'shifter fork 14 is engaged bythe studs 15. v'Ihe lever 16 i s formed with said shifter fork, which 'lever is oscillatably mounted'fon the screw. 17,

which is secured in' thebracket 9.

ofinclination by the bolt 18, which is pro# vided with the head 19 formed thereon,

said

leveris' secured at variously adjusted angles' which head is tightly pressed 4against Vthe f.;

adjacent edge portion of bracket 9, by the hand nut 20, which is screwed onV said'bolt against the front side of the lever 16. The handle 21 is formed on .the extremity of said lever, V adjacent to said hand nut. Said parts form adjusting means, vwhereby the height 'of the shaftlO andthe thereon carried disk .12, are secured jat variously fad-A justed heights. f y s f The worin gear 22'issecured on the upper end portion of said shaft, and is in engagement with the worm ,23, which latter is se-V cured on one end of the worm shaftV 24, which worm shaft is rotatably mounted Von saidftable. The pulley-25is securedon the other end ofsaid-worm shaft, and is driven by the lower portion of the belt26,

which' passes over the upper side said p ulf, ley, and beneath and around the drive pullvley 4. Said belt passes therefrom, around 1 the drive wheel 27 (see Fig. 1,) which is rotated by any suitably appliedpower, not show'irj, .l

Referring toy Fig- ,2, v thel lpressing .roller 28 isrota-tablymounted on the' studshaftn I.

29, one end portioirof whichi's secured Vin the free end of the arm30; The opposite end off said'arm is oscillatablymounted on: the stud bolt 3 1, which is secured in the upper end of the bracket 32,"the` lowerend of which is formed with the bar-33. ySaid bar vis slidably mounted on the ,bed 1, "foi` sliding thereon, through thel guides 34,` The thumb screw 35is screwed throughan undesignated threaded A'aperture p formed secured in various I bythe lock nut 39.

The projection 4() is forinedrwith Lthe bracket 38, the extremity of which projection is directly beneath4 the extremity of the arni projection 4l, which latter is formed onthe'arm 30. n

` The lower end ofthe spring 42 is Vconnectedwith theA extremity of the extension Y 40,: and the upper end of said spring is connectedwith eye 43, (see Fig. 2,) which is formed on thel lower end ofthe sciew 44.

Said screw isp'assed through an aperture formed through the extremity of the extension 41, and is secured at variously adjusted positions, as to height, by tlie thumb nut 45, which is screwed on said screw. Said parts f'orm adjusting means, whereby the tension of saidy spring is adjusted, for adjusting the pressure of the roller 28, upon the disk l2, seen in' Fig. l.l Y. j

In the operation of the described disk Sharpener, with the parts in the position shown, the 'operator loosens th'e nut 7, and thereafter slides the table 6, to such position, that the thereby carried edge portion of the disk 12, is in the desired position, on the grinding wheel5. He then tightens said nut, and thereafter loosens the hand nut 20. 'He thengrasps the handle 2l, and by it and the connecting parts, y.lifts the Y 'disk l2 to the desired elevationy for placing its edge portion at the desiredangle of inclination to the periphery of said grinding wheehfor grinding said edge `portion to the desired angle of inclination to Vthe sides of said disk, after which he tightens said hand nut. Y I

'Said operator loosens the lock nut 39 (see 2,) and by the ythunib wheel 36 turns the bolt 87, until it is adjusted to the desired height for stopping downward movement of the adjacent edgeY portion of Vsaid disk, afterA` which lhe tightens said loc-k nut. v Said operator then applies the unshown V power to the drive wheel 27, (see Fig. 1,)

which by the belt 26 rotates the pulleys 2 5 and 4 and their respectively connected 'shafts' 24, and 4. j

The worm shaft 24, by its worni gear connected parts', slowly rotates the disk l2,v and the direct belt drive of the grinding wheel 5,4 rotates it at high speed, for grinding said edge portionfof the disk 12;. i Saidedge portion of said disk is pressed downward upon said grinding wheel, by the spring the shaft l0, allows said disk to oscillate, to

a certain extent,from action of said pressedge portion of said disk, even thoughfthe same be bent to some extent Vout of t-riie shape. f

It will also be understood that the srnallainount of heat, generated in the edge poring wheel 28, thereby evenly grinding said tion Vof said disk by the friction of grind'- ing the saine is fully radiated therefrom into the air, along the far greater portion of said edge, lwhich is not 'in contact with said grinding wheel.

Ari-er ein disk is thus Simpened, it is' removed from the machine, and is replaced by another disk, in the following manner: v Said operator, with Vone hand lifts `the roller 28 from 'said disk, overcoming the spring 42, seen in Fig. 2, and with the other hand loosens the hand nut 20, (see Fig. 1,) after which, by the previously described disk lifting means, he lifts the shaft 10 and the thereon carried worin 'gear 22, until s aid gear is lifted from engagement `with, the worm 23, upon which said disk is no longer rotated by said `worin, and 'said operator thereafter -tightens said hand-nut. He then lifts said disk 12 from the square porti-nii ll of'saidshaft 10 and lays it aside.

Said operator then replaces saidrenioved disk with another disk to be ground 'as Vpreviously described, after which he looseiis the hand nut 20, and by said'disk lifting means, lowers said disk, to the position whioh was occupied by the-sharpened disk.

y It will be' understood, Vthat disks of'variois diameters can be so adjusted in position, relative to the grinding wheel 5, that their edges will thereby Ybe'gr'ound tothe proper bevel, for etlic'ie'nt vsharpening of the: s'aine.:

Having fully describedv my invention, what 1y elaim 'as new land desire tosecure vby Letters Patent, iszf i Y kl. A base for supporting a grinding inachi'ne; a grinding wheel rtatabiy mounted oii said basegyfiu table mounted on said base for slidablegn'iovernent from and toward said grinding wheel; SeCiiiing means said table is securedin its various positions;

bearing brackets formed with andlpfojecting'from one of the edges of said table; a vertically disposed disk shaft rotatably mounted in the extremities of said brackets; worm gear driving means mounted on said table and shaft wherebysaid disk shaft is slowly rotated; a square portion formed on the upper end 'of said shaft for receiving and loosely holding a disk thereon with the edge of said disk in contact with the peripheral surface of said grinding wheel; a rotatably mounted roller for pressing the contacted portion of the edge of said disk upon said grinding wheel. a spring for actuating said roller to press upon said disk; and adjusting means whereby the tension of said spring is adjusted.

2. In a disk sharpening machine; a base for supporting said machine; a grinding wheel rotatably mounted on said base; a rotatably mounted disk shaft; a bar slidably mounted on saidi base for adjustment longitudinally; securing means whereby said bar is secured in its various adjustments; an upwardly extending arm formed on said bar; an arm one end of which is oscillatably mounted on the upper end of said upwardly extending arm; a pressing roller rotatably mounted on the other end of said arm for pressing the edge of the disk on said grinding wheel; a spring carried byV said arm and bar for :pulling the free end portion of said arm downward; and adjusting means whereby the tension of said spring is adjusted. V

3. In a disk sharpening machine; a base on which said machine is mounted; a table 'slidably mounted on said base; brackets .as to height; securing means whereby said lifting means is secured in its various adjustments; and pressing means whereby the contacted portion of the edge of said disk is pressed downward uponlsaid grinding wheel.

4. Ina disk sharpening machine; a base on which said machine is mounted; a grinding'wheel rotatably mounted on said base; disk holding ymeans on which a disk is loosely held with a portionv of its edge in con- Y tact with said grinding wheel; abar mounted for slidable adjustment on said base; se- Y curing means whereby said bar is secured in its various adjustments; a bracket formed on one end of said bar; a stop screw adjustn ably screwed through a threaded aperture formed through the extendedk endportion ofr said bracket for limiting downward movement of the adjacent edge portion of said disk; securing :means whereby said stop screw is secured in itsvarious adjustments;

andpressng means whereby thecontacted portion of the edge of said disk is pressed `downward upon said grinding wheel.

means whereby said table is secured in itsl various adjustments; brackets formed on one edge of said table; a disk shaft rotatably mounted in the extremities of said brackets a worm gear secured on said disk shaft; a1

worm shaft rotatably mounted on said table;

a worm secured on one end of said worm. shaft said worm being 1n engagement with said worm gear; and a drive pulley secured Y on each one of the other ends of said grinding shaft and said worm shaft said pulleys being in alinement with'each other anddriven by one belt'applied theretoffor simultaneously rotating said disk shaft and said grinding shaft.

In testimony whereof I aiiiXV my signature v in the presence of two witnesses."

JOHN E. BRITTAIN;

Witnesses:

C. DAHLMAN REISN'ER, JAMES H. WILSON. 

